the probe say he's now negotiating a possible guilty plea. >> the pressure is overwhelming when the fbi steps to you, particularly in a public corruption case because they're going to have a lot of evidence. >> reporter: investigators have been examining whether jackson used campaign funds to adorn his beautiful home in washington, d.c. recently on the market for $2.5 million. and there's allegations that jackson bought a female friend a $40,000 rolex. and the justice department has been investigating whether jackson was somehow involved in former governor rod blagojevich's 2008 scheme to pedal the senate seat of barack obama. jackson has been seeking help at the mayo clinic in minnesota. he's missed 225 votes since. >> the fact is, congressman is under medical supervision. and is right now, regaining strength. >> reporter: he did no campaigning to speak of. releasing this october 20th robocall to constituents. >> your patience, your prayers and your support during this difficult time means more to me than you will ever know. >> reporter: in that video, jackson never even asked constitu